Type-writing machine



2 Sheets- Sheet 1.

No Model.)

. R, J. FISHER.

TYPE WRITING MACHINE. 5

No. 572,535. Patented 'Deo. 8, 1896.

III "J m 42 1 I (No Model.) 2 SheetsSheet 2.

R. J. FISHER.

{TYPE WRITING MACHINE Patent ed Dec? 8, 1896.

UNITED, STATES PATENT OFFICE.

ROBERT J. FISHER, OF ATHENS, TENNESSEE.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 572,535, dated December 8, 1896. Application filed July 14, 1896. Serial No- 599,102. (No model.)

T at whom it may concern: 7 7

Be it known that I, ROBERT'J. FIsHER,a citizen of the United States, residing at Athens, in the county of McMinn and State of Tennessee, have invented a new and useful Type- Writing Machine, of which the following is a specification.

My invention relates to type-writing machines, and particularly to improvements 10 upon the constructions shown in my former patents, No. 569,491, granted October 13, 1896; No. 569,625, granted October 20, 1896; 'No. 569,626, granted October 20, 1896, and No. 569,627, granted October 20, 1896, and my former application, Serial No. 545,508, filed April 12, 1895, and has for its object to provide a simple and improved construction of ribbon-feeding mechanism whereby a stepby-step transverse movement of the inkingzo ribbon is attained during the operation of the carriage parallel with the line of writing, the longitudinal movement of the ribbon being produced by means described and claimed in my said former patent, No. 569,626, granted October 20, 1896.

Further objects and advantages of this invention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings,'Figure 1 is a plan view, partly broken away, of a type-writing machine provided with ribbon-feeding mechanism constructed in accordance with my prescut invention. Fig. 2 is a rear View of the same. Fig. 3 is a partial side View. Fig. 4 is a detail vertical section on the line 4 4 of Fig. 2. Fig. 5 is a detail viewin perspective of the feeding mechanism detached.

0 Similar numerals of reference indicate corresponding parts in all the figures of the drawlugs.

. 1 designates parallel tracks upon which is mounted a carriage-supporting frame 2, having suitable line-spacing mechanism 3, which includes pinions 4, meshing with rack-teeth upon sighkparallel tracks. The supportingframei provided with carriage-guides 5,upon which is mounted the carriage 6, having a pendent type-bar-supporting ring 7, arranged between the vertical planes of the carriageguides. The printing and the carriage-feeding mechanisms form no part of my present invention and are the same as those shown in my said former patents and application, said feeding mechanism including a rack 8, arranged parallel with and contiguous to the rear carriage-guide and engaged bya contiguous pinion 9, and a strap 10, connected to a spring-operated drum 11.

The axially-movable ribbon-spools 12 are mounted, as in my former constructions, at opposite sides of the carriage and are provided with spindles 13, mounted in suitable pendent brackets 14, said spindles being provided with ratchet-wheels 15, engaged alternately by contiguous feed-pawls 16 to communicate rotary movement to the spools, and hence longitudinal movement to the ribbon,

during the movement of the carriage in one direction.

Connecting the rear ends of the spindles is a bar 17, arranged parallel with the line of writing and provided at its extremities with bearings 18, in which said spindles are mounted, whereby the latter are free to rotate when actuatedby the longitudinalfeeding mechanism above described, and consisting of the ratchet-wheels l5 and pawls 16. Attached to the center of this connecting-bar 17 is a feed-screw 19, which is arranged parallel with the ribbon-spool spindles and is connected therewith for simultaneous movement by means of the bar. This feed-screw extends through horizontally-alined openings in a yoke 20, which is supported by the frame 2 in rear of the type-bar-supporting ring by means of vertical supporting-rods 21, said yoke being provided with terminal clampshoes 22, which engage the rods, respectively, and are secured in frictional contact therewith by set-screws 28. The rear plate of the yoke is bowed horizontally to the rear to receive a feed-nut 24, through which the feedscrew extends axially, said feed-nut being 5 provided with an extended hub or sleeve 25 to give a long bearing to the feed-screw and thereby prevent the twisting thereof when the mechanism is in operation and thereby prevent the cramping of the ribbon-spool I00 spindles in their bearings. The feed-nut is provided with an adjustable pin or key 26,

consisting of a terminally reduced or pointed set-screw engaging the threads of the screw, and inasmuch as the feed-nut is held from axial movement it is obvious that the rotation thereof will produce axial movement of the screw and hence of the ribbon spool spindles.

The means which I have illustrated in the drawings for producing rotary movement of the feed-nut during the movement of the carriage parallel with the line of writing consists of a rack 27, which is secured permanently to the supporting-frame 2 and is continuously in mesh with said nut. It is obvious that during the advance movement of the carriage in one direction the feed-nut will be turned in one direction and hence cause the movement of the feed-screw in a correspondin g direction, whereas the return movement of the carriage will produce an opposite movement of the nut and hence of the screw.

In order to still further strengthen and direct the movement of the screw, I employ a tubular guide 25, which is arranged in alinement with the feed-nut and its hub 25, for the reception of said screw.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having described my invention, what I claim is 1. In atype-writing machine,the combination with a carriage and an axially-movable ribbon-spool, of a feed-screw mounted for movement parallel with and connected to the spindle of said spool, a feed-nut engaging said screw and held from axial displacement, and means for communicating rotary motion to said nut during the movement of the carriage parallel with the line of writing, substantially as specified.

2. In a type-writing machine,'the combination with a carriage and a ribbon-spool mounted for axial movement transverse to the line of writin g, of a feed-screw mounted for movement parallel with and connected to the ribbon-spool spindle, a feed-nut engaging the screw and held from axial movement, and a rack meshing with the feed-nut to communicate rotary motion to the latter, substantially as specified.

3. In a type-writing machine, the combination with a frame having carriage-guides, and a carriage mounted upon said guides, of ribbon-spools mounted for axial movement transverse to the line 01": writing, abar connecting the ribbon-spool spindles for simultaneous movement, a feed-screw arranged parallel with the spool-spindles and attached to said bar at an intermediate point, a feed-nut. engaging the screw and mounted upon the carriage for rotary movement whereby axial movement is communicated thereby to the screw, and a rack carried by said frame and meshing continuously with the feed-nut, substantially as specified.

4. In a type-writing machine, the combination with a carriage and axially-movable ribbon-spools mounted thereon, of a feed-screw mounted for movement parallel with and conneeted to the ribbon-spool spindles, a feednut mounted for rotary and held from axial movement and having an elongated hub or sleeve through which the screw extends, an adjustable pin or key carried by said hub to engage the screw, and means for communicating rotary motion to the feed-nut, substantially as specified.

'5. In a type-writing machine, the combination with a supporting-frame having carriageguides, a carriage mounted upon said guides, and axially-movable ribbonspools mounted upon the carriage for movement transverse to the line of writing, of parallel vertical supporting-rods on the carriage, a yoke provided with terminal clamp-shoes engaging said supporting-rods and having adjusting means to secure the same against displacement, a feed screw mounted for movement parallel with and connected to the spool-spindles, a feednut engaging the screw and mounted in the yoke whereby it is held from axial movement, and a rack on said frame engaging the feed nut, substantially as specified. 1

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

ROBT. J. FISHER. \Vitnesses:

JOHN H. SIGGERS, HAROLD H. SIMMs. 

